Geert Keizer

The SPEX-airborne multi-angle spectropolarimeter on NASA's ER-2 research aircraft: capabilities, data processing and data products

Christoph U. Keller, Frans Snik, Martin Grim, 2016 .

Heterodyn receiver for the Origins Space Telescope concept 2

Maryvonne Gerin, David T. Leisawitz, André Laurens, 2018, Astronomical Telescopes + Instrumentation.

Manufacturing and optical performance of silicon immersed gratings for Sentinel-5

Luc Dubbeldam, Aaldert van Amerongen, Robert Huisman, 2019, International Conference on Space Optics.

Heterodyne Receiver for Origins

Maryvonne Gerin, David T. Leisawitz, André Laurens, 2021, Journal of Astronomical Telescopes, Instruments, and Systems.

Spectral response measurements at 70 mK of ultra-sensitive TES detectors in the 34–60 μm wavelength range

Michael D. Audley, Gert de Lange, Geert Keizer, 2014, 2014 39th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz).